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Combustion head settings indicated in the schedule are
valid for most cases.
The setting of the fan output according to the installa-
tion should normally be done only through the air
damper. Should one subsequently want to retouch also
the setting of the combustion head, with the burner run-
ning, operate on the rod (1) with a 6 mm spanner (2) as
follows:
TURN TO THE RIGHT: (SIGN +)
In order to increase the volume of air entering the com-
bustion chamber and thus diminishing its pressure.
There is a reduction of CO 2 and the adhesion of the
flame to the air diffuser disc improves.
(Setting advisable for ignitions at low temperatures).
TURN TO THE LEFT: (SIGN –)
In order to reduce the volume of air entering the combustion chamber and thus increasing its pressure. The
CO 2 improves and the adhesion of the flame to the diffuser tends to reduce. (This setting is not advisable for
ignitions at low temperatures).
In any case do not bring the combustion head setting more than one point away from that indicated in the
schedule. One set-point corresponds to 3 turns of the rod; a hole (3) at its end facilitates counting the number
of turns.
AIR DAMPER ADJUSTMENT:
3
It is important to take account of the fact that the air output of the fan differs according to whether
the burner has its metal cover fitted or not.
Therefore we recommended to proceed as follows:
adjust the air damper as indicated in the schedule (point 3);
mount the cover, simply by means of the upper screw;
check smoke number;
should it become necessary to modify the air output, remove the cover by loosening the screw, adjust the
air damper, remount the cover and finally recheck the smoke number.
The settings indicated in the schedule refer to the burner with
its metal cover fitted and the combustion chamber with "zero"
depression. These regulations are purely indicative.
Each installation however, has its own unpredictable working
conditions: actual nozzle output; positive or negative
pressure in the combustion-chamber, the need of excess air,
etc. All these conditions may require a different air-damper
setting.
7
GB
2
1
6
3
D5587
Fig. 5
20013744
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